ABB RELION Series Technical Manual page 675

1MRS758755 A
REC615 and RER615
Technical Manual
CB2 control logic
GUID-58887722-274A-4EFE-B1AA-2EED602DB304 V1 EN
Figure 352: Sub module diagram for CB2 control logic
Operation of the output signals is described in the table.
Table 675: Operating conditions for output signals of CB2
Output signal
OPEN_CB2
CLOSE_CB2
Activation of BLOCK input deactivates the outputs and resets the timers.
Operation description
If bus 2 is faulty and the CB2
position is closed, OPEN_CB2 is
activated after "CB2 Trip delay"
has expired.
Setting Main bus priority = "bus
1".
If CB2 position is closed and bus
1 is healthy, OPEN_CB2 is
activated after "Open CB2
delay" has expired.
Main bus priority = "bus
Setting
2".
If both CB1 and CB2 are open,
and bus 2 is healthy,
CLOSE_CB2 is activated after
Close CB2 delay has expired.
Operation is independent of the
state on bus 1.
Main bus priority = "bus
Setting
1".
If both CB1 and CB2 are open,
bus 1 is faulty and bus 2 is
healthy, CLOSE_CB2 is
Close CB2 delay
activated after
has expired.
Section 9
Control functions
Operation type
Protection
Automatic reconnection
Automatic reconnection
Automatic transfer
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